The nervous system is the means by which the body co-ordinates bodily systems and informs the body about any changes in the environment. The nerves carry brief electro-chemical messages that trigger appropriate responses in the various parts of the body. The messages (impulses) then react and will do certain tasks such as make the muscles…
The lymph system is a collection of thin tubes that carries colourless liquid called lymph. As discovered in the circulatory system, blood travels around the body and delivers oxygen and other nutrients. On its journey, fluid leaks into the bodies tissues and it is this fluid which makes the lymph, along with substances such as…
The endocrine system is a collection of glands that release hormones which have an influence on almost every cell, organ, and function of the body. Hormones are chemicals that carry messages from one cell to another through the bloodstream. The endocrine system regulates our mood, growth and development, the function of tissues, as well…
The primary function of the reproductive system is to ensure that the human species survives. All living things reproduce and it is one of the functions that sets living things apart from nonliving things. The continuation of the species will happen by producing an egg and sperm cell and allowing for the transportation of these…
The Urinary/Excretory System The urinary/excretory system is made up of the kidneys, ureters, bladder and urethra and is responsible for controlling the amount of water and salts that are absorbed and filtered into the blood, and will regulate the chemical composition of body fluids by removing water and salts (metabolic waste). The Kidneys …
The digestive system allows for the breaking down of chemicals in the body that can be absorbed and contains a number of hollow organs which runs from the mouth to the anus. There are a number of stages to digestion as it follows its route through the digestive tract, which takes from 20 – 30…
Homeostasis involves maintaining a constant internal environment in order for the body to function, regardless of the external conditions. The skin plays an important role in this as it contains heat and cold receptors in the skin which regulates the body temperature, keeping it at around 37°C. The glands that we have discussed also…
Glands There are two types of glands that are associated with the Integumentary system. They are sweat and sebaceous glands and both have their own different roles. There are around 2.5 million sweat glands covering the majority of the body and these consist of eccrine and aprocine sweat glands. The eccrine sweat glands produce a…
Nails provide some protection to our sensitive fingers and toes as well as allowing us to grasp small objects The nail is made up from the following:- Nail Wall: This is the folds of skin that overlap the sides of the nail. It holds the nail in place and protects the nail plate edges. …
There are roughly 5 million hairs that cover the body and with the exception of the palms, soles, the lips, the sides of the fingers and toes and some parts of the genitals, the whole body is covered in hair. Hair originates from a structure called a hair follicle. This tube like structure extends into…